Both sides say they are committed to reaching a resolution and continuing negotiations to reach a settlement for about 42,000 urban employees and 8,000 rural and suburban carriers, with CUPW now calling on the federal minister of labour to appoint a mediator.

'Major issues' remain

Canada Post still hasn't adequately addressed "major issues," including pay equity and an "injury crisis," Mike Palecek, the union's national president, told CBC News on Sunday," adding, "We won't have an agreement until we have those issues dealt with."

"Postal workers are the most injured workforce, at five times the average in the federal sector," Palecek said. "This is an injury crisis. It's getting worse and worse. Twenty-five per cent of letter carriers were injured last year. This has to be fixed."

Canada Post had offered a new $10-million health and safety fund it says will make the corporation a "model organization in safety."

On workload,the corporation says it has proposed several measures to "work with the union to better manage employee workload and adjust routes annually for volume changes." The two sides have been in talks for nearly a year.

There is a growing backlog of postal deliveries blamed on rotating strikes that began Oct. 22.

Postal panic

Julia Michaud, a freelance graphic designer in Winnipeg, told CBC News that, while she supports the striking workers, she relies on cheques sent by mail to pay for her rent and food. Since the strike began, payments from across Canada and the United States have stopped coming in the mail.

"Financially it's been hard, you know. You can't do the things that you're normally doing," Michaud said. "You have to do rent, you have to do your credit card payments, your utility payments, and that has to wait. Everything has to wait until it gets resolved."

Others have been stuck waiting for time-sensitive correspondence. Eric Whitaker, another Winnipegger, said he's in limbo while he waits for a letter confirming upcoming medical tests.

"Will the letter arrive next week, next month or past my deadline for appointment? Think about it," he said.

On Saturday, Prime Minister Justin Trudeau took to Twitter to say Canadian businesses and families are relying on the postal service in the holiday season and urging both sides "to resolve their differences quickly and reach a deal."

The Christmas &amp; holiday season is here - and Canadian businesses and families depend on Canada Post. We urge both sides in this labour dispute to resolve their differences quickly and reach a deal.